The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 1993
Filed:
Jun. 04, 1991
Alfred T Jeffries, III, Providence, RI (US);
Kenji Honda, Barrington, RI (US);
Andrew J Blakeney, Seekonk, MA (US);
Sobhy Tadros, Seekonk, MA (US);
OCG Microelectronic Materials, Inc., Cheshire, CT (US);
Abstract
A block copolymer novolak resin composition comprising at least one unit of the reaction product of an alkali-soluble phenolic moiety having at least two phenolic nuclei and at least two unsubstituted positions ortho and para to the hydroxyls in the moiety and a reactive ortho, ortho bonded oligomer having the formula: ##STR1## wherein x is from 2 to 7; wherein R is selected from hydrogen a lower alkyl group or lower alkoxy group having 1-4 carbon atoms and a halogen group; and Y.sub.1 is either a hydroxyl group; an alkoxy group or a halogen group; and Y.sub.2 is hydrogen, alkyl, alkoxy, halogen, hydroxyl, --CH.sub.2 OH, --CH.sub.2 -- halogen, or --CH.sub.2 -alkoxy group.